Recent content by RDM70

Thank you all for the helpful discussion! I think I have it now. I had not considered the impulse that might be delivered by the pivot, nor the instantaneous transitions of the bar's particles.

Suppose a bar is fixed to an axle at one one so that it can pivot. The bar is initially motionless, but is set rotating about it's axle when impacted by a ball. (The ball does not strike the bar at it's pivot point.) Suppose the collision is such that the bar is set rotating and the ball is...